JPH06243933A - Shield type electric connector - Google Patents

Abstract

PURPOSE: To provide a shielded electric connector having a shell to check expansive opening of a joint of one shell and a shell to check a movement of a connector housed in the shell in two shield shells to slidably engage with each other. CONSTITUTION: A shielded electric connector 1 has two insert conductive shells 37 and 38 to slidably engage with each other in the shaft direction. Since a joint 45 of one shell 37 is covered with a seamless wall of the other shell 38, expansive opening of the joint 45 is checked. Since at least an opening lock part 48 of one shell 37 engages with a projecting lock part 34 of a housing 2, a backward movement of the housing 2 can be checked to the shells 37 and 38.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to shielded electrical connectors, and more particularly to shielded electrical connectors having a conductive shell for EMI (electromagnetic interference) shielding.

[0002]

2. Description of the Related Art U.S. Pat. No. 5,158,481 discloses a shield type electric device including a terminal support block (hereinafter, simply referred to as a block), a terminal supported by the block and connected to an electric wire, and a shield member for a connector. A connector is disclosed. The shield member has a mating end formed on a front shell surrounding the mating end of the block, a conductive rear shell surrounding the block, and a deformable strain relief formed on the rear shell.

The two rear shells close like a bivalve and one fits into the other and fits together. The front shell is formed as a seamless drawn tube having an outer shape that corresponds to the shape of the mating connector. This profile should be free of distortion, especially that which may occur when the strain relief of the shield member is deformed by gripping the electrical cable. A separate drawn front shell is separated from the deformable strain relief of the rear shell.

As will be described later, the front shell needs to be connected to the rear shell in a somewhat complicated manner. The front and rear shells are assembled by hooks that pass through the grooves in the front shell. The compression beam near the hook presses against the front shell, thus providing electrical conduction between the front and rear shells.

[0005]

The two rear shells disclosed in the above-mentioned US Pat. No. 5,158,481 have side walls forming openings facing each other, and positively prevent the side walls from opening outward. It has no means to do it. Therefore, after the rear shells are fitted to each other, the side wall may open outward due to an external force or the like.

In the connector disclosed in US Pat. No. 3,760,335, it is necessary to take care so that the terminal support block does not move rearward with respect to the front shell, especially during mating with the mating connector. . During mating, the terminals of the connector engage and wipe each other, removing oxide or other contaminant coatings from the terminals that can cause unwanted voltage drops across the surface of the terminals. If the terminal support block moves rearward during fitting, there is a problem that the terminal wiping amount for cleaning the terminal decreases.

Therefore, it is a first object of the present invention to provide a shielded electrical connector having a shell in which the risk of the side wall opening to the outside is significantly reduced.

A second object of the present invention is to provide a shield type electric connector having a shell for preventing the rearward movement of the electric connector housed in the shell.

[0009]

SUMMARY OF THE INVENTION To achieve the first object, a shielded electrical connector according to the present invention comprises a contact held in an insulating housing and a shield member attached to the insulating housing. Type electrical connector, the shield member has two snap-in conductive shells slidably engaged with each other along a fitting direction of the connector, and one shell is surrounded by the other shell. This prevents expansion of the seam of the one shell.

Further, the shield type electrical connector of the present invention for achieving the second object is a shield type electrical connector comprising a contact held in an insulating housing and a shield member attached to the insulating housing. The shield member has two fitting type conductive shells that are slidably engaged with each other along the fitting direction of the connector, and at least one of the shells is locked to the insulating housing to shield the shield. It is characterized in that movement of the insulating housing with respect to a member is prevented.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of a shielded electrical connector of the present invention. FIG. 2 is a perspective view showing the shielded electrical connector of FIG. 1 after assembly. Figure 3
FIG. 2 is a cross-sectional view showing a state where the shielded electrical connector of FIG. 1 is partially assembled. FIG. 4 is a cross-sectional view showing a state after the shield-type electric connector of FIG. 1 is assembled.
FIG. 5 is a cross-sectional view showing a strain relief portion of the shield member of FIG. FIG. 6 is a cross-sectional view showing a state in which the strain relief portion grips the cable. FIG. 7 is a sectional view of the strain relief portion of FIG. FIG. 8 is a partial cross-sectional perspective view of the overmolded shielded electrical connector.

The electrical connector disclosed in US Pat. No. 3,760,335 comprises an insulating housing and conductive signal contacts. The contacts are grouped into pairs, and the insulative isolation wall of the housing separates one contact from the other contact of each contact pair. A large number of contact pairs are arranged along the insulating separation wall 7.

1 and 8, the electrical connector 1 comprises an insulating housing 2 and a number 3 of conductive signal contacts 4, 5 housed within the housing 2. Such a connector 1 may include only the signal contacts 4, 5 disclosed in US Pat. No. 3,760,335. Contact pairs are also particularly suitable for connection with conductors such as twisted wire pairs used in the communications field for transmitting data and voice.
Each twisted wire pair is connected to a pair of contacts.

Such a connector 1 may comprise on the housing 2 signal contacts 4, 5 and at least one power supply contact 6. The pair 3 of signal contacts 4, 5 is an insulating separating wall (hereinafter simply “separating wall”) inside the housing 2.
It is arranged along 7). Signal contacts 4, 5
Pair 3 is located on opposite sides of the separation wall 7 separating the pair 3. The signal contacts 4 and 5 are arranged in two rows parallel to each other. The surface of each contact finger 9 is larger than the surface of each signal contact 4, 5 and is wide enough to dissipate the heat generated by power loss. Furthermore, the contact finger portion 9 has a volume (m
ass). When current is transmitted in the power contact 6, heat is generated due to power loss. This heat is released from the surface of the power contact 6. Since the power contact 6 has a larger surface area and a larger volume, the temperature rise of the power contact 6 is limited.

The separating wall 7 bridges and connects between the side walls 10 and 11 of the housing 2. The separating wall 7 is the housing 2
From the front mating end 12 of the housing toward the rear of the interior 8 of the housing. The separated partition wall 13 of the inside 8 is provided between the separation wall 7 and the upper wall 14 of the housing 2, and between the separation wall 7 and the housing 2.
A bridge is formed between the lower wall 15 and the lower wall 15. That is, the partition wall 13 connects the separating wall 7 and the upper and lower walls 14 and 15. Upper and lower walls 14, 15 are side walls 10, 11
The outer shell of the housing 2 is formed by bridging and connecting them. Contact receiving chamber 16 in housing 2
Are formed between the partition walls 13 and extend to the back surface of the separating wall 7 to receive the signal contacts 4 and 5. In the power contact 6 shown in FIG. 1, the fingers 9 are coupled to the body 17 which has a surface area large enough to dissipate the heat generated by the power loss. The separation wall 7 extends in front of the partition wall 13,
A series of recesses 19 aligned with the contact receiving passages are provided on opposite sides. The recess 19 receives the signal contacts 4, 5 and the contact fingers 9. Recess 19 for receiving contact finger 9
Is larger than the recess 19 that receives the signal contacts 4, 5. The protruding lances 20 of the signal contacts 4, 5 and the power contact 6 interferingly engage with a wall (not shown) of the housing 2 and resist the withdrawal of the contacts 4, 5, 6 from the recess 19. Each of the signal contacts 4 and 5 and the power contact 6 has a one-piece structure obtained by punching and bending a single metal plate.

The cable connector 1 will be described with reference to FIGS. The separating wall 7 of the cable connector 1 is bifurcated by the passage 26 of the front fitting end 12, and receives a part of a mating connector (not shown). The recess 19 faces the passage 26. Thus, the contacts 4, 5 on opposite sides of the separating wall 7 face the passage 26. A pair 3 of signal contacts 4, 5 are connected to each pair 3 of conductors 27 of a single electrical cable 26 or a multi-conductor electrical cable (not shown). The signal line may be a twisted pair. In FIG. 1, each signal contact 4,
5 further comprises a connecting part having arms 28 which extend laterally outwardly from each other. The arm portion 28 can be bent into an open barrel shape surrounding and connecting the conductor (signal line) 27. The other set of arms 29 is bendable in an open barrel shape extending laterally to each other and surrounding and connecting the insulation surrounding the conductor 27.

In FIGS. 3, 4 and 6, the contact finger portion 9
Extends from a connection portion of the cable 25 with a power transmission conductor having a larger diameter than the signal line 27, that is, the electric wire 30. In particular, the body portion 17 comprises a connecting portion having a set of arms 32, 33 extending laterally relative to each other. The arm portion 32 can be bent into an open barrel shape that surrounds and connects the power transmission line 30. Since the power transmission line 30 passes current, it has a larger diameter than the signal line 27. The signal line 27 has a small diameter because it needs to transmit an electric signal in which the voltage value is the most important, not the power value. The pair of arms 33 extend laterally with respect to each other and are bendable into an open barrel shape that surrounds and connects the insulator surrounding the power transmission line 30.

In FIGS. 1 and 8, the protruding lock portion 34
Is an inclined wedge-shaped protrusion that is located outside the upper wall 14 and inclines toward the front fitting end 12. The mating end 12 has a chamfer 35 that crosses the wall 14 and makes the width of the wall 14 narrower than the width of the wall 15. The chamfered portion 35 imparts polarity to the connector 1 by giving directionality to the fitting end 12. The chamfer 35 extends rearward and terminates in a shoulder 21 facing the front of the protruding corner of the housing 2.

In FIGS. 1 and 2, the shield member 36 for the electrical connector 1 comprises two conductive telescopic shells 37, 38 which fit into each other and slide. Each shell 37, 38 has a one-piece structure obtained by punching and bending a single metal plate, and is bent to form an enclosure. There are also formed first and second telescoping tubular enclosures 39, 40 having front open ends 41, 42 and rear open ends 43, 44 that are slidably fitted together. The vertical seam 45 of the enclosure 39 of the first shell 37 includes a front end 41 and a rear end.
Cross 43 and penetrate them. The longitudinal seam 46 of the enclosure 40 similarly traverses and penetrates the front end 42 and the rear end 44. The seam 46 of the second shell 38 is opened by a predetermined width. The seams 45, 46 of each enclosure 39, 40 have the same enclosure
Opposite the seamless wall of 39, 40, another enclosure 3
Sliding along 9 and 40 seamless walls. The open front end 41 of the first shell 37 is the fitting end of the shield member 36. The seam 45 of the first shell 37 is covered by the second shell 38 by fitting, and the seam 45 is expanded and the mating end is closed.
Prevents deformation of 41. Such deformation is not desirable because it causes frictional resistance during fitting with the mating connector and prevents complete fitting of the shield member 36 and the mating connector.

The number of bent portions 47 of the tubular enclosure 39 corresponds to the number of chamfers of the housing 2 of the connector 1. The fold 47 defines the perimeter of the mating end 41. Notch (notc
h) 22 has a rear end 43 extending forward and aligned with a chamfered portion 23 formed by a bent portion 47. The fold 47 of the enclosure 40 defines the perimeter of the open ends 42, 44 and corresponds to the shape of the first shell 37 as well as the shape of the second shell 38.

The opening-shaped lock portions 48 are located on both sides of the joint 45, and are locked to the connector 1 by being locked to the protruding lock portions 34 of the housing 2. As shown in FIG. 3, the cable 25 is connected to the connector 1. Connector 1
Is inserted into the open rear end 43 of the first enclosure 39, and the protruding lock portion 34 of the housing 2 is locked by the lock portion 48 of the first shell 37 of FIG.
It slides along the enclosure 39 until it enters and locks.
When the first shell 37 is locked to the connector 1, the rearward movement of the connector 1 with respect to the fitting end 41 of the shield member 36 is prevented, especially when the connector 1 is fitted to the mating connector. The front facing shoulder 21 faces the rear facing shoulder 24,
The forward movement of the housing 2 with respect to the first shell 37 is prevented. The first shell 37 locks the housing 2 on both sides of the seam 45 to prevent the seam 45 from expanding.

The first and second shells 37, 38 are connected to each other along both sides of the seam 45 to prevent the seam 45 from expanding. The protruding lock portion 49 outside the enclosure portion 39 of the first shell 37 has a slanted wedge shape and is a cut-and-raised portion from the shell 37 that is slanted toward the open rear end 43.

The lock portion 50 having an opening shape in the enclosure portion 40 of the second shell 38 is aligned with the lock portion 49 of the first shell 38. The bendable strain relief (cable fixing) portions 51, 52 at the rear of the first and second shells 37, 38 bend together to grip the cable 25. The strain relief portion 52 of the second shell 38 of FIG. 5 comprises a groove 53, from which the clamping finger 54 extends. The strain relief portion 51 of the first shell 37 also has a groove 55, and a recess 56 is formed at the base of the groove 55. The bendable strain relief parts 51 and 52 are
As shown in FIGS. 2 and 3, both groove portions 53, 55 which are bent obliquely outward and overlap each other as shown in FIG.
Forming a gap in which the cable 25 is received. The strain relief portions 51 and 52 are extended straight as shown in FIG. 7 to clamp the cable 25 and deform the cross section of the cable 25 so as to match the shape of the groove portions 53 and 55. The clamp fingers 54 are closed and enter the recess 56. Next, as shown in FIG. 8, an overmolded portion 57, which is an insulating molded product having a desired shape, covers the cable 25 and the strain relief portions 51 and 52 and is brought into close contact therewith.

The mating end 41 of the first shell 37 and the bendable strain relief 51 are joined by a tongue 58 between them. The tongue piece 58 includes a strain relief portion 51 and an enclosure portion.
39 and the strain generated by the deformation of the strain relief portion 51 are not transmitted to the enclosure portion 39. The first shell 37 provides the strain relief with a strain relief portion 51 that deforms over the cable 25, and the fitting end 41 at the front end of the shield 36 has a shape that is not distorted by the deformation of the strain relief portion 51 by the tongue 58. .

The tongue 58 extends from the front end of the second shell 38 along the rear end thereof. Further, it extends inside the second shell 38 and covers the widened seam 46 of the second shell 38. The tongue piece 58 has a taper formed rearward and reaches the narrow portion 60 adjacent to the strain relief portion 51. Flange 59 of the second shell 38
Face each other across the seam 46 and overlap the tongue 58.
A notch 61 is formed in each flange 59, and the extending direction is changed by the notch 61 so that the notches 61 converge toward a position adjacent to the strain relief 52. Therefore, the width of the widened seam 46 becomes narrow. The narrow portion 60 is
It is narrower than the width of the widened seam 46 at the front end of the second shell 38. The second shell 38 is a seam that first widens the narrow portion 60.
It is incorporated into the first shell 37 by inserting it at the front end of 46 and then sliding the flange 59 forward over the narrow portion 60. The convergent part of the flange 59 has a tapered tongue piece 58.
And prevents the rear shell 38 from moving forward. The enclosures 39, 40 of the shells 37, 38 are slidably fitted together. The protruding lock portion 49 of the first shell 37 enters and locks the lock portion 50 of the second shell 38 to prevent the second shell 38 from moving rearward. The second shell 38 has a tab 62 (see FIG. 4) projecting inward. This tab is a cut-and-raised version of the shell 38, which engages the rear end 43 of the first shell 37 and prevents the rearward movement of the first shell 37. This causes the shells 37, 38 to lock together.

In this embodiment, the first shell 37 and the insulating housing 2 are locked by the engagement of the opening locking portion 48 of the first shell 37 and the protruding locking portion 34 of the insulating housing 2. An inwardly projecting lock portion may be formed on the to engage with the insulating housing.

[0027]

According to the shield type electrical connector of the present invention as defined in claim 1, the two shells attached to the connector are of a fitting type in which they are slidably engaged with each other along the fitting direction of the connector. Since the seam of one shell is surrounded by the other shell, the expansion of the seam of the shell is prevented. Therefore, the fitting failure with the mating connector due to the expansion of the joint is prevented, and the mating connector can be reliably mated.

According to the shielded electrical connector of the present invention as defined in claim 2, since at least one shell locks the housing to prevent the housing from moving, an appropriate wiping amount between the contacts is secured. It
Therefore, there is an advantage that the reliability of electrical connection is not deteriorated.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a shielded electrical connector of the present invention.

FIG. 2 is a perspective view showing a state after assembly of the shielded electrical connector of FIG.

3 is a cross-sectional view showing a partially assembled state of the shielded electrical connector of FIG.

FIG. 4 is a cross-sectional view showing a state after assembly of the shielded electrical connector of FIG.

5 is a cross-sectional view showing a strain relief portion of the shield member of FIG.

FIG. 6 is a cross-sectional view showing a state in which a strain relief portion holds a cable.

7 is a cross-sectional view of the strain relief portion of FIG.

FIG. 8 is a partial cross-sectional perspective view of an overmolded shielded electrical connector.

[Explanation of symbols]

 1 Shield type electrical connector 2 Insulation housing 4, 5, 6 Contact 34, 48 Lock 36 Shield member 37, 38 Conductive shell 45 Seam

Claims (2)

[Claims] 1. A shield type electrical connector comprising a contact held in an insulating housing and a shield member attached to the insulating housing, wherein the shield members slide with respect to each other along a fitting direction of the connector. Shield type having two engaging type conductive shells engaged with each other, and by enclosing one of the shells with the other shell, expansion of a seam of the one shell is prevented. Electrical connector. 2. A shield type electric connector comprising a contact held in an insulating housing and a shield member attached to the insulating housing, wherein the shield members slide with respect to each other along a fitting direction of the connector. A shielded electrical machine comprising two mating, electrically conductive, engaging shells, at least one of which shell locks with the insulating housing to prevent movement of the insulating housing relative to the shield member. connector.